- Complete staging work-up within 3 months prior to registration. All patients will have contralateral mammography, chest X-ray (Posteroanterior and lateral) and/or CT scan and/or MRI (Magnetic Resonance Imaging), abdominal ultrasound and/or CT scan (computerized tomography) and/or MRI, and bone scan. In case of positive bone scan, bone X-ray is mandatory to rule out the possibility of non-metastatic hot spots. Other tests may be performed as clinically indicated.